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This genuine Johnson Controls replacement part provides the exact tolerances required for industrial and commercial HVAC filtration maintenance
Common Questions: What are the symptoms of a bad limit switch on a furnace
including the inducer motor
Common Questions Is the 512-050-230 thermo-fuse resettable
and 210G Series Regulators
MARS 39220 Limit Switch This genuine Johnson Controls replacementThe MARS 39220 Limit Switch is a versatile, high reliability solution for field service technicians needing an exact or universal replacement for furnace high limit applications. This adjustable snap disc thermostat features a temperature range of 135F to 175F with a fixed 40F differential, allowing for precise calibration to match specific internal plenum requirements. Designed as an open on rise safety device, the 39220 ensures the heating circuit
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